Capacity development activities
Innovations reported in genetic (variety and breeds), biophysical, social science, production systems, management practices, and communication methods research areas.

Participants in short-term trainings and scaling activities.
Trainees involved in academic programs (BSc, MSc, PhD).

Outcome cases facts

Million households in 7 South and Southeast Asian countries are cultivating CIP-related potato varieties that represent 19% of the total area planted to improved varieties.
Million ha in 9 South and Southeast Asian countries are grown using CIAT-related cassava varieties.
Policies and regulations in the agriculture and nutrition sector developed and adapted based on scientific evidence provided by RTB Program participants.
RTB at a glance

The CGIAR Research Program on Roots, Tubers and Bananas (RTB) was launched in 2012 to harness the untapped potential of banana (including plantain), cassava, potato, sweetpotato, yam, and other root and tuber crops to improve food security, nutrition and livelihoods. RTB brings together the expertise and resources of five centers: the International Potato Center (CIP), which leads the program; Bioversity International; the International Center for Tropical Agriculture (CIAT); the International Institute of Tropical Agriculture (IITA); and the Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), which represents several other French partners in the research program. The centers have teamed up to collaborate on common issues affecting RTB crops, mobilize complementary expertise and resources, avoid duplication of efforts, and create synergies. This collaborative approach aims to increase the benefits of the centers’ research and interventions for smallholder farmers, consumers, and other actors in root, tuber and banana agri-food systems.

In 2018 RTB was consolidating research in five interdisciplinary flagship projects (FPs), illustrated below and described throughout this report. Each flagship has a dynamic leader based in one of
the centers. Each flagship is composed of a set of interrelated research ‘clusters’ which have clear impact pathways through which RTB centers and their partners collaborate to achieve targeted outcomes. The areas of focus for each of the clusters were identified through an RTB assessment to determine the options with the greatest potential for impact.

The nested impact pathways at the cluster and flagship project levels are at the heart of the program’s results-based management. A monitoring and evaluation system, aligned with the overall CGIAR performance management framework, has been developed and its implementation is facilitated through MEL, an online planning, monitoring, evaluation, and learning platform, collaboratively developed with several CRPs and centers.

In 2018 RTB maintained collaboration with 381 partners, primarily national agricultural research organizations, academic and advanced research institutions, private companies and nongovernmental organizations (NGOs). These valuable partnerships played an increasingly important role in this second phase as the program works to scale out the technologies and approaches developed under its flagships. RTB sought to accelerate the scaling of innovations linked with capacity development for partners, while ensuring that research benefits women and men alike and engages youth. Together, RTB and its broad network of partners worked to
achieve the program’s intermediate development outcomes – which are fully aligned with the Sustainable Development Goals – by 2022.

Flagship projects
Sustainable Development Goals
Image Image Image Image Image Image Image Image Image Image Image Image
Selected RTB Program Targets (2022)

20 million people (50% women) increased their income

30,000 small and medium enterprises operating profitably in the RTB seed and processing sectors
8 million farm households increased RTB crop yield through the adoption of improved varieties and sustainable management practices
10 million people (50% women) have improved their diet quality
1.9 million ha of current RTB crops production area converted to sustainable cropping systems
At least 2 million households with increased capacity to deal with climate risks and exrtremes
9,500 individuals (50% women) with improved capacities in partner organizations
At least 5 partnership and scaling models tested in a minimum of 5 target countries
Where we work

RTB Where We Work 2019 Placeholder
RTB Where We Work 2019



Flagship 1
genetic resources

Flagship Project 1 (FP1) is developing leading-edge science for more efficient breeding of user-demanded root, tuber and banana varieties, while overcoming the limitations of conventional breeding for vegetatively propagated crops. Plant breeders are using new genomic tools across the RTB Program being developed in collaboration with top universities and research centers around the globe. This strategic investment will allow RTB breeders to quickly combine favorable traits, now spread across dozens of breeding lines, to develop new varieties that are more acceptable to consumers, with better nutritional value, higher yield and resistance to shifting pests and diseases in a changing climate.  “The new tools developed by RTB allow the best use of the untapped genetic resources, genetic markers and other latest techniques, making it possible to get farmers the varieties they need much faster,” says Luis Augusto Becerra, FP1 leader and principle research scientist at CIAT. FP1 also contributes to enhancing the conservation and use of genetic diversity. So, these new tools are being used to characterize the genetic variability in genebank collections as well as the diversity maintained in farmers’ fields.

Flagship 2
productive varieties and quality seed

Flagship Project 2 (FP2) focuses on breeding better varieties and making sure that they match the needs and preferences of farmers and consumers, women and men. FP2 also strengthens the seed systems that get these varieties into farmers’ hands. Farmers’ and consumers’ demands for new traits must be communicated back to breeders, so that the varieties now in the pipeline will be well-received when they are released. “It is essential to bring the farmers’ criteria and preferences on board as early as possible in a breeding program. This makes sure that the new crop varieties developed by our plant breeders are the ones that farmers need. Now the emphasis is not on the number of varieties released, but on how well the variety meets all requirements of end users and making sure they get into use. This is crucial for improving nutrition in developing countries,” says Maria Andrade, FP2 leader, plant breeder at CIP, and World Food Prize winner.

Flagship 2 Highlights

Barcodes to keep banana breeding on track

Banana breeding is complex and getting seed from crosses is challenging. A new digital system, the Banana Breeding Tracking Tool (BTracT) now helps breeders keep tabs on each plant and manage data and activities at different sites. Each banana plant gets its own barcode, which is scanned on the BTracT handheld device. The barcodes are used to electronically record data on pollination, harvest and tissue culture. BTracT uses a web-based dashboard to follow each plant as it moves from tissue culture lab to screenhouse to the field. This reduces mistakes in identity, locates critical bottlenecks and makes banana breeding more efficient.

“The BTracT app and dashboard are providing real-time data to the breeding team and shifts the efforts from data collection and curation to making informed breeding decisions quicker and with accurate data,” says Trushar Shah, bioinformatician at IITA.

Flagship 3
Resilient roots, tubers and bananas

Flagship Project 3 (FP3) helps to develop the strategies needed to protect roots, tubers and bananas from pests, diseases and abiotic stresses. “It’s not enough to breed the best new varieties. We also have to see that the crops are grown in ways that allow them to express their full genetic potential,” says James Legg, FP3 leader and plant virologist at IITA.

These efforts include spotting new diseases as they emerge in countries for the first time, finding the best way to manage pests and diseases and working with farmers to develop sustainable agronomic practices which will boost their yields and protect them from the impacts of climate change.

Flagship 3 Highlights

The potato cyst nematode (PCN) is a serious pest from South America which has been found recently in sub-Saharan Africa (Kenya and Rwanda). Surveys with IITA, CIP, the international center for insect physiology and ecology (icipe), the Kenyan government, and other partners (Kenya Plant Health Inspectorate Services, Kenya Agricultural and Livestock Research Organization Kenyatta University, and Food and Agriculture Organization (FAO) - Kenya) revealed that PCN is widespread in Kenya. Because it did not have a nematologist on staff, CIP teamed up via RTB with the IITA nematologist and the nematology laboratory at icipe and Kenyatta University. Knowing one’s enemy can be half the battle: Once PCN was found in Kenya, RTB and survey partners collaborated to make posters and other educational material to warn farmers of the dangers of the pest, and to teach some basic management techniques. After the surveys, Kenya issued phytosanitary guidelines to ensure that certified seed potato is produced only on soil that is free of PCN, a crucial measure for managing this important pest.

Yam anthracnose disease attacks the water yam, an important food crop in West Africa. In the field, the disease is influenced by the weather, and measuring its severity is subject to human error. Lava Kumar, Kolade Olufisayo and colleagues at IITA have developed a more accurate method to evaluate this disease.

A healthy leaf is placed in a Petri dish and inoculated with spores. At different time points, up to 14 days, images are captured with a digital camera. The percentage of the leaf that is covered with lesions is later measured using a program called Leaf Doctor, and percentage ranges converted to a rating scale. “By evaluating the leaves in the lab instead of in the field, we can test 100 samples for USD15 each in a week. This gives us a fast, cheap and accurate way to see which genotypes of water yam are disease resistant. Developing convenient lab assays is essential for improving the efficiency of phenotyping and breeding for resistant varieties,” explains Kumar.

Flagship 4
Nutritious food and value added

RTB crops are being bred to make them more nutritious, for example by boosting their level of vitamin A. New strategies are being developed to take these new crop varieties to the farmers who grow them and to consumers as well. “We must make sure that the public appreciates the nutritional value of these important new varieties and that they are widely available to the people who need them, for improved health,” says Tawanda Muzhingi, FP4 leader and food scientist at CIP. The advocates of new crops in the policy arena are being trained to encourage their use. Researchers are also working on ways to turn roots, tubers and bananas into new food products, which will make them more widely available. Recipes are being created to preserve the nutrients of the new varieties. One exciting technique is also turning wasted cassava peelings into commercial animal feed.

Flagship 5
Improved livelihoods at scale

Flagship Project 5 (FP5) helps other RTB innovations go to scale. Gender specialists consider the way in which changing roles of men and women need to be considered to scale RTB innovations while paying special attention to gender equity. RTB also examines its own partnerships to ensure that the most efficient methods of stakeholder participation are used. “We are generating evidence of the opportunities and bottlenecks for the development and uptake of RTB innovations. This informs the RTB teams about which research and development activities and partnerships have the highest likelihood of achieving impact at scale,” explains Marc Schut, FP5 leader and senior innovation and scaling scientist with IITA and WUR. FP5 teams also review impact, for example, implementing surveys with genetic fingerprinting to pinpoint which crop varieties have actually been adopted.

Knowledge products



Publications in ISI journals (83%)


Open access journal articles (78%)


Pubications downloaded from CGSpace


Datasets published


Peer reviewed journal articles


Open access reviewed journal articles published of which 103 are open access


Partnership is central to international agricultural research for development. Collaboration mobilizes research results by bringing together diverse actors at international, regional, national and local levels. Partnerships are crucial for RTB’s success and form an intrinsic part of the theories of change which make outcomes possible. Moreover, the scale and scope of partnerships change along the continuum from research to development.

In 2018 RTB worked with 381 formally established partners, including private sector, national agricultural research organizations, advanced research institutions, academic institutions, governmental and NGOs. Innumerable CBOs, and farm households not individually listed here were also central to the program’s success.

Major Donors

African Agricultural Technology Foundation

Australian Centre for International Agricultural Research

Austrian Development Agency

Bill & Melinda Gates Foundation

Cornell University

Department for International Development/UK Aid

Deutsche Gesellschaft für Internationale Zusammenarbeit

Directorate-general Development Cooperation and Humanitarian Aid, Belgium

European Commission

Food and Agriculture Organization of the United Nations

Government of Liberia

Government of Norway

Government of Tanzania

Government of Uganda

International Bank for Reconstruction and Development

International Development Research

International Development Research Centre, Canada

International Fund for Agricultural Development

Iowa State University

Irish Aid

Japan International Cooperation Agency

McKnight Foundation

Mennonite Economic Development Associates

North Carolina State University

Queen’s University Belfast

Queensland University of Technology

Swiss Agency for Development and Cooperation

Syngenta Foundation for Sustainable Agriculture

United States Agency for International Development

United States Department of Agriculture

Université of Lausanne


Government of Liberia (Ministry of Agriculture)


Government of Tanzania (Ministry of Agriculture, Food Security and Cooperatives)


Government of Uganda

Financial report
CGIAR Funding Windows
  • Windows 1&2 funds are provided by CGIAR to RTB for allocation across the agreed product portfolio. Window 1 funds are allocated by the CGIAR System Organization to different CRPs, including RTB, while Window 2 funds are designated by donors specifically to RTB.
  • Window 3 funds are allocated directly to CGIAR centers by donors and are mapped into RTB when they are consistent with the RTB product portfolio. Window 3 includes a deduction of 2% of the total budget as contribution to the CGIAR System Organization.
  • Bilateral funds are contracts directly signed between a center and a donor and mapped into RTB.
  • The 2018 financial year started with the positive outlook communicated by the System Office. RTB received a Windows 1&2 (W1&2) allocation of USD21.7M. This allocation comprised USD19.5M, that represented the “most likely” scenario, and an additional USD2.2M (+10%). Nevertheless, for internal management purposes, RTB started working with the likely scenario of USD19.5M, which was maintained until the end of the year because the additional funds were not confirmed.

    Also, RTB assigned to participant centers a total carry- over from 2017 of USD2.3M. Hence, the total forecast for W1&2 was USD21.8M and represented 23% of the total budget.

    A total of USD72.5M of W3, bilateral projects and RTB participant centers’ own funds were mapped under RTB in 2018 and represented 77% of the total budget. The total 2018 budget for the program was USD94.4M.

    2018 Expenditure

    RTB total expenditure for 2018 was USD80.3M, or 85% of the budget, of which USD19.0M (24%) were from W1&2, and USD61.3M (76%) from W3, bilateral and centers’ own funds. Execution rate of W1&2 budget reached 87% and 85% for W3, bilateral and centers’ own funds.

    The RTB FPs have an average execution of 86%. No FP exceeded its budget. FP3 had the highest execution rate (94%) and FP4 had the lowest (78%).

    The chart to the right shows the W1&2 budget and expenditure by FP and the PMU (Program Management Unit) expenditure of USD1.6M.

    RTB 2012 – 2018

    In absolute terms, the contribution of W1&2 to RTB’s budget was stable in the last two years (USD20.5M in 2017 and USD21.8M in 2018).

    Based on the actual expenditures reported for all the funding windows, the relative contribution of W1&2 has increased from 20% in 2017 to 24% in 2018. This change is explained by an overall reduction of USD13.9M in the amount of W3, bilateral and center funds for the same period.

    The total expenditure in 2017 was USD93.5M against USD80.3M in 2018. The implementation rate in 2018 was 85%, similar to the rate recorded in 2017 (87%). RTB’s cumulative expenditure has reached USD529.2M over the seven years of the program (USD154.6M from W1&2, and USD374.5M from W3, bilateral and center funds).

    Flagship 2018 W1&2 Budget vs Expenses (USD Millions)
    W1 & 2
     Bioversity   CIAT   CIP   IITA   CIRAD   WUR   Partners   PMU   TOTAL 
    FP1 : Enhanced Genetic Resources 0.71 0.80 1.42 0.64 0.10 0.09 3.77
    FP2 : Productive Varieties & Quality Seed 0.62 0.59 2.89 1.23  0.04 0.06  – 5.44
    FP3 : Resilient Crops 1.28 0.38 0.77 1.20 0.08 0.31  – 4.01
    FP4 : Nutritious Food & Added Value 0.21 0.58 0.70 0.78 0.24 0.10  – 2.60
    FP5 : Improved Livelihoods at Scale 0.65 0.51 1.02 1.19  0.01 0.34  – 3.71
    CRP Management & Support Cost 0.04 0.06  0.08 0.08  – 0.00 2.07 2.33
    TOTAL 3.52 2.91 6.88 5.11 0.48 0.40 0.49 2.07 21.86

    W1 & 2
     Bioversity   CIAT   CIP   IITA   CIRAD   WUR   Partners   PMU   TOTAL 
    FP1 : Enhanced Genetic Resources 0.71 0.79 1.34 0.63 0.10 0.09 3.66
    FP2 : Productive Varieties & Quality Seed 0.59 0.58 2.36 1.21  0.04 0.06  – 4.84
    FP3 : Resilient Crops 1.23 0.36 0.75 1.15 0.08  – 3.58
    FP4 : Nutritious Food and Added Value 0.16 0.34 0.19 0.59 0.21 0.10  – 1.60
    FP5 : Improved Livelihoods at Scale 0.72 0.46 1.10 1.36  0.02 0.16  – 3.81
    CRP Management & Support Cost 0.04 0.06  0.08 0.08  – 1.33 1.59
    TOTAL 3.36 2.64 5.57 4.83 0.45 0.34 0.19 1.67 19.06
    RTB Expenditure: 2012 – 2018